G.f. A(x) satisfies 1 + 3*A(x) = Sum_{n>=0} (x + 2*A(x)^n)^n.
A380062
G.f. A(x) satisfies 1 + 3*A(x) = Sum_{n>=0} (x + 2*A(x)^n)^n.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =67a(5) =267a(6) =1333a(7) =6257a(8) =31649a(9) =159205a(10) =824227a(11) =4295599a(12) =22706441a(13) =120952097a(14) =649957785a(15) =3515569465a(16) =19134939879a(17) =104700236227a(18) =575656327477
External references
- oeis: A380062